2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavutil/audioconvert.h"
25 AVFilterBufferRef *ff_null_get_audio_buffer(AVFilterLink *link, int perms,
28 return ff_get_audio_buffer(link->dst->outputs[0], perms, nb_samples);
31 AVFilterBufferRef *ff_default_get_audio_buffer(AVFilterLink *link, int perms,
34 AVFilterBufferRef *samplesref = NULL;
36 int planar = av_sample_fmt_is_planar(link->format);
37 int nb_channels = av_get_channel_layout_nb_channels(link->channel_layout);
38 int planes = planar ? nb_channels : 1;
41 if (!(data = av_mallocz(sizeof(*data) * planes)))
44 if (av_samples_alloc(data, &linesize, nb_channels, nb_samples, link->format, 0) < 0)
47 samplesref = avfilter_get_audio_buffer_ref_from_arrays(data, linesize, perms,
48 nb_samples, link->format,
49 link->channel_layout);
62 AVFilterBufferRef *ff_get_audio_buffer(AVFilterLink *link, int perms,
65 AVFilterBufferRef *ret = NULL;
67 if (link->dstpad->get_audio_buffer)
68 ret = link->dstpad->get_audio_buffer(link, perms, nb_samples);
71 ret = ff_default_get_audio_buffer(link, perms, nb_samples);
74 ret->type = AVMEDIA_TYPE_AUDIO;
79 AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays(uint8_t **data,
80 int linesize,int perms,
82 enum AVSampleFormat sample_fmt,
83 uint64_t channel_layout)
86 AVFilterBuffer *samples = av_mallocz(sizeof(*samples));
87 AVFilterBufferRef *samplesref = av_mallocz(sizeof(*samplesref));
89 if (!samples || !samplesref)
92 samplesref->buf = samples;
93 samplesref->buf->free = ff_avfilter_default_free_buffer;
94 if (!(samplesref->audio = av_mallocz(sizeof(*samplesref->audio))))
97 samplesref->audio->nb_samples = nb_samples;
98 samplesref->audio->channel_layout = channel_layout;
99 samplesref->audio->planar = av_sample_fmt_is_planar(sample_fmt);
101 planes = samplesref->audio->planar ? av_get_channel_layout_nb_channels(channel_layout) : 1;
103 /* make sure the buffer gets read permission or it's useless for output */
104 samplesref->perms = perms | AV_PERM_READ;
106 samples->refcount = 1;
107 samplesref->type = AVMEDIA_TYPE_AUDIO;
108 samplesref->format = sample_fmt;
110 memcpy(samples->data, data,
111 FFMIN(FF_ARRAY_ELEMS(samples->data), planes)*sizeof(samples->data[0]));
112 memcpy(samplesref->data, samples->data, sizeof(samples->data));
114 samples->linesize[0] = samplesref->linesize[0] = linesize;
116 if (planes > FF_ARRAY_ELEMS(samples->data)) {
117 samples-> extended_data = av_mallocz(sizeof(*samples->extended_data) *
119 samplesref->extended_data = av_mallocz(sizeof(*samplesref->extended_data) *
122 if (!samples->extended_data || !samplesref->extended_data)
125 memcpy(samples-> extended_data, data, sizeof(*data)*planes);
126 memcpy(samplesref->extended_data, data, sizeof(*data)*planes);
128 samples->extended_data = samples->data;
129 samplesref->extended_data = samplesref->data;
132 samplesref->pts = AV_NOPTS_VALUE;
137 if (samples && samples->extended_data != samples->data)
138 av_freep(&samples->extended_data);
140 av_freep(&samplesref->audio);
141 if (samplesref->extended_data != samplesref->data)
142 av_freep(&samplesref->extended_data);
144 av_freep(&samplesref);
149 void ff_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
151 ff_filter_samples(link->dst->outputs[0], samplesref);
154 /* FIXME: samplesref is same as link->cur_buf. Need to consider removing the redundant parameter. */
155 void ff_default_filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
157 AVFilterLink *outlink = NULL;
159 if (inlink->dst->nb_outputs)
160 outlink = inlink->dst->outputs[0];
163 outlink->out_buf = ff_default_get_audio_buffer(inlink, AV_PERM_WRITE,
164 samplesref->audio->nb_samples);
165 outlink->out_buf->pts = samplesref->pts;
166 outlink->out_buf->audio->sample_rate = samplesref->audio->sample_rate;
167 ff_filter_samples(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
168 avfilter_unref_buffer(outlink->out_buf);
169 outlink->out_buf = NULL;
171 avfilter_unref_buffer(samplesref);
172 inlink->cur_buf = NULL;
175 void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
177 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
178 AVFilterPad *dst = link->dstpad;
180 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
182 if (!(filter_samples = dst->filter_samples))
183 filter_samples = ff_default_filter_samples;
185 /* prepare to copy the samples if the buffer has insufficient permissions */
186 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
187 dst->rej_perms & samplesref->perms) {
188 int i, planar = av_sample_fmt_is_planar(samplesref->format);
189 int planes = !planar ? 1:
190 av_get_channel_layout_nb_channels(samplesref->audio->channel_layout);
192 av_log(link->dst, AV_LOG_DEBUG,
193 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
194 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
196 link->cur_buf = ff_default_get_audio_buffer(link, dst->min_perms,
197 samplesref->audio->nb_samples);
198 link->cur_buf->pts = samplesref->pts;
199 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
201 /* Copy actual data into new samples buffer */
202 for (i = 0; i < planes; i++)
203 memcpy(link->cur_buf->extended_data[i], samplesref->extended_data[i], samplesref->linesize[0]);
205 avfilter_unref_buffer(samplesref);
207 link->cur_buf = samplesref;
209 filter_samples(link, link->cur_buf);